might be ignited under water and made to explode on reaching the surface, while Carlos spent his time in carrying out a design that he had borne in mind ever since the planning of their expedition. It was the preparing for service of two Cuban flags. One was a transparency fitted with electric wires and made fast to a float that would support it on the surface of the water. This was intended only for night use, while the other, which was of silk with a slender staff of steel, was designed to attract attention by daylight.
"The explosion, close under their bows, of a giant fire-cracker."
Shortly before sunset, with everything in readiness for her great venture, the Mermaid forsook her snug berth and began to move across the harbour, with the eyes of her turret just awash and the flag of free Cuba fluttering bravely a foot above the surface of the water. It did not attract attention until it passed slowly within a hundred yards of the Spanish battle-ship Alfonso XIX., when a clamour of voices from her decks announced its discovery.
